LEUCHTTURM 5 in 1 Pocket Magnifier. (2. 5 x / 10 x). Has 2.5 increases (lens large) and 10 increases (lens small). With 3 LEDs of high technology and UV lamp wavelength long. Both lenses spherical of Crystal acrylic provide some pictures perfect. Lens size: 30 x 37 mm (large) and 15 mm or (small). It includes a small removable pen for taking notes and a protective cover in imitation leather. Runs on batteries 3 x LR927 (included). Black plastic housing. External dimensions: 38 x 91 x 8 mm